Epson L1800 DTF Printer Carriage Movement and Screeching Noise Issue

Question:
I am using a PuneHod L1800 DTF printer. After cleaning the print head and reattaching it, the print head will move back and forth once, but on the second attempt it will not move forward. Instead, it makes a loud screeching sound. Can you help with this issue?

Answer:

From your description, it sounds like your Epson L1800 (marketed under PuneHod as a DTF-converted unit) is experiencing mechanical resistance after a head cleaning. The screeching noise typically points to the carriage or drive belt struggling against obstruction or resistance. Let's go through the most likely causes and solutions:

1. Check the Capping Station

The capping station (where the print head rests when idle) is crucial for sealing and cleaning. If it is not aligned properly after reassembly or if excess ink or debris has built up, it can cause the print head to jam or drag. Carefully inspect the capping station for dried ink, misalignment, or loose components. Cleaning it with a lint-free cloth and isopropyl alcohol can help restore smooth operation.

2. Inspect the APG (Automatic Paper Gap) Level

On converted DTF printers, the APG lever or height adjustment mechanism determines the space between the print head and the film/paper. If it is set too low, the head can scrape the surface, causing both resistance and screeching noises when the carriage attempts to move. Ensure the APG lever is at an appropriate height to give the head clearance.

3. Examine the Carriage Path

The carriage (the assembly that holds the print head) must glide smoothly across the printer rail. A screeching sound often indicates a dry or obstructed rail, a dirty encoder strip, or tension issues with the timing belt.

• Lubricate the rail: Apply a very small amount of silicone-based grease to the carriage rail.

• Clean the encoder strip: This transparent strip runs behind the carriage and helps control positioning. If it's dirty or smudged, the printer may struggle with movement. Clean gently with a lint-free cloth and alcohol.

• Check the timing belt: Look for fraying, misalignment, or excessive tension. If the belt skips or slips, it can create loud noises and prevent forward movement.

4. Mechanical Alignment

Since you mentioned cleaning and reattaching the print head, double-check that the print head assembly is seated correctly and that no cables are pinched. A misaligned head or slightly bent rail can also cause the movement issue.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis, so it might take a few weeks before we can get your printer to drop it off. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed. However, we acknowledge that our rates aren't the most economical. Thus, we highly recommend that you resort to self-help via online research. You can start by checking out YouTube or visiting our YouTube channel's homepage (https://youtube.com/@bchtechnologies). Look for specific videos using the search icon next to "About" on the right-hand side of the menu bar. I receive dozens of queries every day asking about videos for specific topics. Having created videos over the past nine years, it's challenging to remember every single one. Therefore, using YouTube's search function would be most efficient. Plus, YouTube might suggest relevant videos from other channels that could assist you.

Thank you again for contacting us and for your trust in BCH Technologies. We truly appreciate your patience and support as we continue to provide guidance for the printer community.